"Just because you see a smile, don't think you know what's going on underneath. A smile is a valuable tool, my dear. It inspires your friends, keeps your enemies guessing, and ensures no matter what comes your way, you're the one in control."
―Alastor, to Charlie Morningstar
Alastor, also known as The Radio Demon, is a sinner demon and one of the many powerful Overlords of Hell. He is one of the main protagonists of Hazbin Hotel.

He is the wickedly charismatic demon who has offered to assist Ch